The Characteristics of Heat Balance and Temperature Regime in the Paddy, Potato, Bare Fields and in the Asphalt Area

Abstract

The characteristics of heat balance and thermal environments in the different land use in summer were compared experimentally under the same meteorological conditions. It was shown that the paddy field acted as a sink of heat in the crop-growing season. In this season, the characteristic of heat balance in the asphalt area compared with those in the paddy and non-irrigated potato fields, was that the divisions to sensible heat in the afternoon and to thermal radiation component at night were high. The surface temperature has reached over 50°C in the asphalt area and in the non-irrigated bare field, while it has never exceeded 27°C, 30°C and 35°C in the paddy field, the potato field and irrigated bare filed, respectively. These results showed that the thermal environment can be moderated by irrigation and vegetation, and that this effect is remarkable by vegetation.